<template>
  <div class="login_container">
    <div class="login_box">
      <!-- 1.头像区 -->
      <div class="avatar_box">
        <img src="../assets/logo.png" alt="" />
      </div>
      <!-- 2.登录  -->
      <el-form
        ref="loginFromRef"
        :model="loginFrom"
        :rules="loginFrimRules"
        label-width="0px"
        class="login_form"
      >
        <!-- 用户名 -->
        <el-form-item label="" prop="username">
          <el-input
            placeholder="用户名"
            prefix-icon="iconfont icon-user"
            v-model="loginFrom.username"
          >
          </el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item label="" prop="password">
          <el-input
            placeholder="密码"
            prefix-icon="iconfont icon-3702mima"
            v-model="loginFrom.password"
            type="password"
          >
          </el-input>
        </el-form-item>
        <!-- 按钮区域 -->
        <el-form-item label="" class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="resetLoginFrom">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 这是表单的数据绑定
      loginFrom: {
        username: 'admin',
        password: '123456',
      },
      // 这是表单的验证规则
      loginFrimRules: {
        // 验证用户名书否合法
        username: [
          { required: true, message: '请输入登录名称', trigger: 'blur' },
          {
            min: 3,
            max: 10,
            message: '长度在 3 到 10 个字符',
            trigger: 'blur',
          },
        ],
        // 验证密码是否合法
        password: [
          { required: true, message: '请输入登录密码', trigger: 'blur' },
          {
            min: 3,
            max: 16,
            message: '长度在 6 到 16 个字符',
            trigger: 'blur',
          },
        ],
      },
    }
  },
  methods: {
    // 点击重置按钮
    resetLoginFrom() {
      // console.log(this);
      this.$refs.loginFromRef.resetFields()
    },
    // 登录预验证
    login() {
      this.$refs.loginFromRef.validate(async (valid) => {
        // console.log(valid);
        if (!valid) return
        const { data: res } = await this.$http.post('login', this.loginFrom)
        // console.log(result);
        if (res.meta.status !== 200) return this.$message.error('登录失败') //console.log("登录失败");
        // console.log("登录成功");
        this.$message.success('登录成功')
        // 1。将登录成功之后的token，保存到客户端的sessionStorage中
        // 1.1 项目中除了登录之外1的其他API接口，必须再登录之后才能访问
        // 1.2 token只应当前网站打开期间生效，所以将token保存在sessionStorage中
        console.log(res)
        window.sessionStorage.setItem('token', res.data.token) // setItem('key','vlaue')
        // 2.通过编程式导航跳转到后台主页，路由地址是 /home
        this.$router.push('/home')
      })
    },
  },
}
</script>

<style lang="less" scoped>
.login_container {
  background-color: #2b4b6b;
  height: 100%;
}
.login_box {
  width: 450px;
  height: 300px;
  background-color: #fff;
  border-radius: 3px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
}
.avatar_box {
  height: 130px;
  width: 130px;
  border: 1px solid #eee;
  border-radius: 50%;
  padding: 10px;
  box-shadow: 0 0 10px #ddd;
  position: absolute;
  left: 50%;
  // top: 50%;
  transform: translate(-50%, -50%);
  background-color: #ddd;
  img {
    width: 100%;
    border-radius: 50%;
    background-color: #eee;
  }
}
.btns {
  display: flex; //弹性盒
  justify-content: flex-end; //最后对其
}
.login_form {
  position: absolute;
  bottom: 0;
  width: 100%;
  padding: 0 20px;
  box-sizing: border-box;
}
</style>
